If what I think you are talking about, the only way to see unselected items that have no fill or stroke would be to view via the outline view..?
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If you name the artboards, when you save as artboards it will export with the arboard names, if you leave the artboards with the same name they will add the numbers on the end otherwise they would all be named the same thing and that just can't happen like that.
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Can you explain your set up, are you working on one monitor/dual monitors? What version are you currently working on? Mac/PC? Have you tried using the arrange tab options..? Like so...
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I'm not sure this is possible currently. Try adding to this request...
https://illustrator.uservoice.com/forums/333657/suggestions/45250147
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It's always a good idea to check the system requirements when investing in new equipment.
https://helpx.adobe.com/illustrator/system-requirements.html
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Have you tried clearing your prefernces..?
How to reset Illustrator Preferences - Adobe Support Community - 10602277
Have you tried rolling back the software..?
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Can you send a screenshot of your layers panel..? You shouldn't have any clipping paths if it's just the background colour and the number, is the number outlined as well?
Should be something like this...
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If the bars are a specific width you can use the align tool, specifically the 'Horizontal Distribution Centre'. All you need to do is work out the combined width of your bars, set the two outer bars at either end and then select all and align them.
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What lines do you want to delete?
If it's all the ones outside the main shape you could use your direct selection arrow (white) and click and drag over then and delete. It all depends on how the artwork has been created though, so without having the file to play with is a little hard to be precise.
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Can you provide screenshots of what you are talking about?
What system are you using PC or Mac?
What spec is your machine?
How are you saving the file?
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Sorry it's really difficult to see those screenshots, any chance of a better quality/larger
Have you tried resetting your preferences..?
How to reset Illustrator Preferences - Adobe Support Community - 10602277
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Have you tried clearing your preferences?
How to reset Illustrator Preferences - Adobe Support Community - 10602277
Have you tried uninstalling and reinstalling..?
Uninstall or remove Adobe Creative Cloud apps
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Can you provide us with more details please so we can try and help..?
We need Illustrator version, what system you are working on PC/Mac, what setup you have, does it meet minimun specifications, etc.
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