A guy at the shop does this all the time and it drives me crazy...and it sounds like what your doing...
when you go to type in text, you hit the "T" on the toolbar, right?
Ok, as my co-worker does, he knows the size, font, and color he wants the text...with me so far?
Instead of clicking where he wants the text and THEN entering font, size, and color...he hits text, picks his color, size, and font, then click where he wants the text.
What this does is sets the default for text, Flexi says to change the default you must:
1) Click text on the toolbar
2) change font, size, ect.
3) Click selector tool on toolbar
Then your settings become the default.
Well, this also happens if you click on the page after you make those selections. My co-worker will be working and when I get on flexi to type something in my font size will be 18" and red in color, and usually some funky a$$ font.
Maybe this will help with your problem!