"Hi...we just replaced the catalytic converter on my ford escape but now it pops and you can see it pop back as well...Please help me on what we did wrong or forgot to do...thanks"

 

Need some more info.
year
Why replaced the converter
Who diagnosed it
miles
who replaced it
a little more specific about what you "see" as popping back

 

2004 ford escape
a friend/mechanic said it was clogged cause it would barely run...it was actually horrible there are about 69K miles..i bought a new one and my boyfriend replaced it...the old one had nasty charcoal stuff falling out of it...when we turn it on it actually sounds really good then you can hear it make a pop ( it sounds like POP) and you can see the catalytic converter actually move,..there was smoke comming out the exhaust s well...ugh this has been a nightmare lol please help me...

 

I don't know how much help I can be, but if we review some of the things that can affect the converter just maybe that might help.
Converters usually last a heck of a lot longer than 69,000 mi.
The problem is to determine what is poisoning the converter.
Anti freeze is one of them, as are some adhesive/sealers , but one of the most troublesome is an engine that is running very rich.
Was there any occasion where the check engine lite came on or was blinking , but was ignored?
Is the check engine lite on now?
Has anyone been adding any fuel additives to the fuel ie. methanol to prevent fuel line/filter freezing? I'm sure there are other contributors to this forum that have some questions also.
These questions need to be covered before offering any type solution.