resize shape but it keeps moving

When i place 2 grid lines to create characters/font letters on the lines. But when I place the letters on the baseline. I want to resize the letters to the top line the height of the letter. Have all of the snap to options selected. And picked the character "b" and the character does not fit on the exactly. Ive tried to resize it using measurement different in height/scale in OBJECT SIZE. It doesn't work and also I tried the manual resize but even if the lines over lap the letter/shape doesn't fall on the line. There is always a gap. And the resting of the letter resizes the whole letter/shape, if just go to a corner the whole shape gets resized. Getting fed up. Does anyone have any ideas. 

Ill post images tomorrow. Posting the late a night. So hopefully it can be sorted as soon as.