Is upgrading to 2.2 an option, seeing as the 2.2 forum has now been retired in the last 12 hours?
These threads might be relevant, but the first link caught my eye when googling "pfsense can't remove hook"
https://forum.pfsense.org/index.php?topic=36043.msg203273#msg203273
https://forum.pfsense.org/index.php?topic=31409.0
https://forum.pfsense.org/index.php/topic,31247.0.html
Although slightly different to your setup, ie mine is just pfsense2.2rc into a single modem with no vlan to access the router/modem, the highest I've seen a ppp attempt is 34 times (reverse order to your layout).
Jan 19 16:41:55 ppp: [wan_link0] LCP: Open event
Jan 19 16:41:55 ppp: [wan_link0] Link: OPEN event
Jan 19 16:41:55 ppp: [wan] Bundle: Interface ng0 created
Jan 19 16:41:55 ppp: web: web is not running
Jan 19 16:41:55 ppp: process 5756 started, version 5.7 (root@pfsense-22-amd64-builder 12:58 18-Nov-2014)
Jan 19 16:41:55 ppp:
Jan 19 16:41:55 ppp: Multi-link PPP daemon for FreeBSD
Jan 19 16:40:47 ppp: [wan_link0] Link: reconnection attempt 34 in 4 seconds
Jan 19 16:40:47 ppp: [wan_link0] LCP: Down event
a single retry attempt (reverse order to yours)
Jan 19 20:17:40 ppp: [wan_link0] LCP: SendConfigReq #1
Jan 19 20:17:40 ppp: [wan_link0] LCP: state change Starting –> Req-Sent
Jan 19 20:17:40 ppp: [wan_link0] LCP: Up event
Jan 19 20:17:40 ppp: [wan_link0] Link: UP event
Jan 19 20:17:40 ppp: [wan_link0] PPPoE: connection successful
Jan 19 20:17:39 ppp: PPPoE: rec'd ACNAME "npe001.cam-B20"
Jan 19 20:17:33 ppp: [wan_link0] PPPoE: Connecting to ''
Jan 19 20:17:33 ppp: [wan_link0] Link: reconnection attempt 1
Jan 19 20:17:29 ppp: [wan_link0] Link: reconnection attempt 1 in 4 seconds
Jan 19 20:17:29 ppp: [wan_link0] LCP: Down event
Jan 19 20:17:29 ppp: [wan_link0] Link: DOWN event
Jan 19 20:17:29 ppp: [wan_link0] PPPoE connection timeout after 9 seconds
Jan 19 20:17:20 ppp: [wan_link0] PPPoE: Connecting to ''
Jan 19 20:17:20 ppp: [wan_link0] LCP: LayerStart
Jan 19 20:17:20 ppp: [wan_link0] LCP: state change Initial –> Starting
Jan 19 20:17:20 ppp: [wan_link0] LCP: Open event
Jan 19 20:17:20 ppp: [wan_link0] Link: OPEN event
Jan 19 20:17:20 ppp: [wan] Bundle: Interface ng0 created
Jan 19 20:17:20 ppp: web: web is not running
Jan 19 20:17:19 ppp: process 65724 terminated
Dont know the history of your pfsense usage, ie installed from scratch or had some updates/upgrades over time, but some upgrade processes do not always go smoothly, so sometimes its best to install from scratch and config from scratch if problems occur.
fwiw.