Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu' -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H   -I.  -I../bash -I../bash/include -I../bash/lib  -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall
uname output: Linux ubuntu 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 4.2
Patch Level: 45
Release Status: release

Description:
In a multi-line alias, where entries are separated by semi-colon, "source" commands are not executed in-step with all the other commands.  After all the non "source" commands are executed, the "source" commands are executed in reverse order.  See below for an example.

Repeat-By:

ubuntu@ubuntu:~$ cat script.sh
#!/bin/bash
(echo -n "$1 "; date +%S.%N)
ubuntu@ubuntu:~$ alias foo1
alias foo1='~/script.sh one; source ~/script.sh two; source ~/script.sh three; ~/script.sh four'
ubuntu@ubuntu:~$ alias foo2
alias foo2='~/script.sh one;
source ~/script.sh two;
source ~/script.sh three;
~/script.sh four;
'
ubuntu@ubuntu:~$ foo1
one 09.742581873
two 09.745315889
three 09.749212492
four 09.761410711
ubuntu@ubuntu:~$ foo2
one 11.805819275
four 11.819741270
three 11.828260887
two 11.829470548

Fix:

Use a single-line alias.  Or use the "&&" operator to chain commands (which changes the functionality to be short-circuit evaluations).

Also verified this behavior on RHEL6 with bash 4.1.2(1).