Why does photoshop unexpectedly resize an image when i drag it to another canvas?

Question

Hello everyone.
I'm just having a simple problem that is not the worst or most crippling, but it is slightly annoying. For example, say I resize an image down to 245 pi X 300 pi. I then drag it from it's original canvas to another one (essentially I'm dragging and dropping). The sizing is not right? It is not the same 245  pi X 300 pi on the other canvas? Is that something I did and is there any way I can fix that because I like using templates that have specified pixel lengths and widths. So I keep having to make approximations which is really annoying.
Anyways, I hope there is some possible way you can help me. Thanks in advance

Answer 1

Please provide sensible details if you need more help.
BOILERPLATE TEXT:
Note that this is boilerplate text.
If you give complete and detailed information about your setup and the issue at hand,
such as your platform (Mac or Win),
exact versions of your OS, of Photoshop (not just "CS6", but something like CS6v.13.0.6) and of Bridge,
your settings in Photoshop > Preference > Performance
the type of file you were working on,
machine specs, such as total installed RAM, scratch file HDs, total available HD space, video card specs, including total VRAM installed,
what troubleshooting steps you have taken so far,
what error message(s) you receive,
if having issues opening raw files also the exact camera make and model that generated them,
if you're having printing issues, indicate the exact make and model of your printer, paper size, image dimensions in pixels (so many pixels wide by so many pixels high). if going through a RIP, specify that too.
A screen shot of your settings or of the image could be very helpful too,
etc.,
someone may be able to help you (not necessarily this poster, who is not a Windows user).
Please read this FAQ for advice on how to ask your questions correctly for quicker and better answers:
http://forums.adobe.com/thread/419981?tstart=0
Thanks!