People Uploading Much Bigger Files To My Server, That I Want (using Php)

i have free hosting server and a rule to upload 3MB file max. it works for FTP, but somehow it doesn't work for php. It seems for php the limit on my server is 100MB (no idea why)

i use following directives to limit file size in php.ini :

; Maximum size of POST data that PHP will accept.
post_max_size = 4M

(4 just for some margin )

; Maximum allowed size for uploaded files.
upload_max_filesize = 3M

and i still can find 100MB files on disk. this is part of log file from apache from the account that uploaded it to me:

Code:
boorako.[] someip - - [13/May/2007:12:21:22 +0200]
"POST /a/redir.php?capthatag=accesscode&saveto=&path=/some/path/boorako.[]/a&comment=&domail=&email=&useproxy=
&proxy=&split=&method=tc&partSize=10&redirto=/a/index.php&link=redir.php?capthatag=accesscode&saveto=&path=
/some/path/boorako.[]/a&comment=&domail=&email=&useproxy=&proxy=&split=&method=tc&partSize=10&redirto=
/a/index.php&link=[url]
HTTP/1.1" 302 188

[url]
boorako.[] someip - - [13/May/2007:12:21:35 +0200]
"POST /a/redir.php?capthatag=accesscode&saveto=&path=/some/path/boorako.[]/a&comment=
&domail=&email=&useproxy=
&proxy=&split=&method=tc&partSize=10&redirto=/a/index.php&link=redir.php?capthatag=accesscode&saveto=&path=
/some/path/boorako.[]/a&comment=&domail=&email=&useproxy=&proxy=&split=&method=tc&partSize=10&redirto=
/a/index.php&link=[url]

HTTP/1.1" 302 188 [url]
"Mozilla/5.0 (Windows; U; Windows NT 5.1; pl; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3"

as the effect of this (at least i think so), there was 100MB file in his home dir.

any idea how can he POST such big files even with those two directives?

i have also set LimitRequestBody to 5194304 and LimitXMLRequestBody to 5194304 in apache2.conf which also should stop files being POSTED as big as 100MB.

i have php 4.4.4-9, Linux Debian, apache 2.2.3 working in worker mpm, and php as fastcgi.

P.S. i removed server info like IP, dir and address to not show specifics about my server in public, i put [] there.