Line of text turning into separate text boxes in Acrobat

Hi

After Ive inserted a line of text into a document, very often , when I save it, it turns the sentence Ive just typed into separate text boxes instead of keeping it as one long sentence contained ina single text box ( I hope you can understand what I am trying to say).

This then makes it very difficult when editing the document if I want to move the sentence to a slightly different position , because instead of clicking on just 1 box, I might have to click on maybe 15 or so separate boxes to move the text., which is quite annoying and time consuming.

I'm probably doing something wrong, but don't know how to stop the single text box from splitting up into multiple text boxes.

Can anyone help with this please.

Also, if I am trying to make up a "shape" using adobe that I need to insert into my ukulele song sheets,  I cant seem to group the shape I am making up , like I can do in power point.

A friend told me to do the following:-

hold down control

left click on all of the objects in the shape until they are highlighted

release the control button

Right click

But this doesn't work, can anyone explain to me where I am going wrong and what I can do to group the little symbols I am making up instead of having to move all of the separate parts of the symbol one at a time.

Finally.................Is there a way I  can set the default text for writing and editing my text to Comic sans  for all functions , instead of having to select this font every time I am writing something.

Thank you very much and hope you can answer my questions

Cheers

JimmyG